Entrance channel correlations in sup 40 Ca

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5591764

Bull, J S

Angular distributions and excitation functions of the {sup 39}K(p,{alpha}{sub 0}) reaction were measured for 68 resonances in the proton energy range E{sub p} = 2.2 MeV to 4.0 MeV. This experiment was performed with an overall energy resolution of 350 eV to 400 eV (FWHM) at the Triangle Universities Nuclear Laboratory KN Van de Graaff accelerator. Angular correlation methods were used to derive expressions for the {sup 39}K(p,{alpha}{sub 0}) angular distributions. For several of the 2{sup +} resonances, the experimental angular distributions yielded two possible solutions for the proton partial reduced widths. These solutions were then compared with the elastic scattering data to determine the correct solution. Three sets of reduced widths and one pair of reduced width amplitudes were obtained for 30 of the 2{sup +} resonances. For the 1{sup {minus}} resonances, the angular distributions and excitation functions did not provide sufficient information to uniquely determine the reduced widths, although detailed spectroscopic information was obtained for 13 resonances. Statistical analyses were performed on the 2{sup +} reduced widths and amplitudes. The proton partial widths agree well with Porter-Thomas distribution. There are strong width correlations between two of the three proton channels and between the {gamma}{sub 20} and {gamma}{sub 22} reduced width amplitudes. These data were transformed into the zero representation; again there is a strong width correlation. These channel correlations are interpreted as evidence for direct reactions.

• Research Organization: Duke Univ., Durham, NC (United States)
• OSTI ID: 5591764
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663540 -- Nuclear Mass Ranges-- A=39-58-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CORRELATIONS
CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELECTROSTATIC ACCELERATORS
ENERGY RANGE
EXCITATION FUNCTIONS
FUNCTIONS
HADRON REACTIONS
MATHEMATICS
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEON REACTIONS
PICKUP REACTIONS
POTASSIUM 39 TARGET
PROTON REACTIONS
RESONANCE
SCATTERING
STATISTICS
TARGETS
TRANSFER REACTIONS
VAN DE GRAAFF ACCELERATORS